/*******************************************************************************
 * Copyright 2011, 2012 Chris Banes.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.zpj.popup.imagetrans;

import android.annotation.TargetApi;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;
import android.view.View;

import java.lang.reflect.Field;

class Compat {

    private static final int SIXTY_FPS_INTERVAL = 1000 / 60;

    public static void postOnAnimation(View view, Runnable runnable) {
        if (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN) {
            postOnAnimationJellyBean(view, runnable);
        } else {
            view.postDelayed(runnable, SIXTY_FPS_INTERVAL);
        }
    }

    @TargetApi(16)
    private static void postOnAnimationJellyBean(View view, Runnable runnable) {
        view.postOnAnimation(runnable);
    }

    public static int getBackGroundAlpha(Drawable background) {
        int alpha;
        if (background == null) return 0;
        if (VERSION.SDK_INT > VERSION_CODES.KITKAT) {
            alpha = background.getAlpha();
        } else {
            Drawable.ConstantState state = background.getConstantState();
            try {
                Field field = state.getClass().getDeclaredField("mBaseColor");
                field.setAccessible(true);
                int color = (int) field.get(state);
                alpha = Color.alpha(color);
            } catch (Exception e) {
                alpha = 0;
            }
        }
        return alpha;
    }
}